Power hammer



2 Sheets-Sheet l JfizwhrM I elttozlwq J. SUSTARICH POWER HAMMER Filed Oct. 6. 1921 own June 12, 1923.

J. SUSTARICH POWER HAMMER Filed Oct. 6, 1921 Patented June 12, 1923.

UNITED STATES JOSEPH SUSTARICH, OF CHICAGO, ILLINOIS.

POWER HAMMER.

Application filed October 6, 1921. Serial No. 505,854.

To all whom it may concern: 1

Be it known that I, JosErH SUSTARIGH, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certaln new and useful Improvements in Power Hammers, of which the following is a specification.

This invention relates to certain new and useful improvements in power hammers employed in the art of metal forging and weldm The primary object of the invention is to provide a generally simplified and lmproved means for attaching the hammer to the helve of that type of press or power hammer embodying a vertically slidable and guided hammer.

Another object of the invention is to provide an improved and yielding means for connecting the sliding hammer and swinging helve of a power press allowing ready change in the angular relations of the hammer and helve.

Still another object of the invention is to provide an improved attaching means for connecting the hammer and helve of a power press which may be quickly applied or removed for repair or renewal purposes and at a reasonable cost and expenditure of time and labor.

the invention is better understood and the invention consists in the novel form, combination and arrangement of parts hereinafter more fully described in connection with the accompanying drawings and in which like designating characters refer to corresponding parts throughout the several views.

In the drawings, 7

Figure 1 is a side elevational View of a power hammer constructed in accordance V ment, the central portion of said groove 22 being deepened as at 23 for a purpose which with the present invention, Figure 2 is a front elevational view thereof,

Figure 3 is an enlarged front: elevational taken f Referring more in detail to the several views, the present invention is shown as incorporated in a press including the usual bed 5 with an intermediate upright or standard 6 having a transverse shaft 7 journaled in the upper end thereof upon which one end of the helve 8 is secured, said shaft 7 being.

extended to one side. of the standard where one end of a lever 9 is secured thereon. The other end of the lever 9 is connected in the usual way by a pitman 10 to a crank pin 11 rigid with a fastv pulley 12 that is fixed upon a transverse driving shaft 13 journaled at the rear end of the bed 5, another pulley 14: being employed upon the shaft 13 and freely revoluble upon said shaft for convenience in throwing the hammer into and out of operation. The machine is provided with a separate bolted-on anvil block 15 .at its forward end which is overhung by an upwardly and forwardly curved stand'ard16 having a guide portion 17 in which the weighted hammer 18 is vertically slidable. The anvil block 15 and hammer 18 are vprovided with the usual removable dies 19 and the guide portions 17 may be provided with suitable wearing plates With adjustment screws 20 as is usual in the art.

The present invention resides particulady in the means for connecting the upper end of the'hammer 18 to the forward or free end of the helve 8. The present invention aims to provide a serviceable means for this purpose which will permit, swinging of the helve without binding of the hammer within its guide as the angular relation between the helve and hammer vary in operation. The helve 8 is provided at its free end portion with a depending enlargement 21 'll'aving an arcuate vunder surface, and a transverse semi-circular groove 22 is provided in the uppersurface of the helve concentric with thearcuateface of the enlargewill presently become apparent.

A transverse cross head 24 is seated in the groove 22 so as to freely rota-te in the latter,

and the centralpo'rtion of this cross head is provided with an annular enlargement 25 arranged to be received within the deepened portion 23 of the groove 22 so as to hold the cross head 24 against movement transversely of the helve. The reduced upper end of the hammer 18 is provided with a transverse opening 26 through which extends a saddle plate 27 of curved form, the ends of the saddle 27 being bifurcated to provide pairs of legs 28 of upwardly curved form which extend beyond opposite sides of the hammer 18. A T-head bolt 29 is disposed ateach side of the helve with its head portion engaged under the curved or hook-shaped legs 28 and with its shank extending upwardly through the slot or space between said legs, said bolts 29 being slidably extended through transverse openings provided in projecting end portions 30 of the cross head at. The upper and lower faces of the ends 30- of the cross head. 24 are preferably fiat and washers 31 are disposed upon the fiat upper faces thereof to form abutments for the lower ends of the helical springs 32 which surround the shanks of the bolts above the cross head, the upper ends of said springs bearing against further washers 33 placed upon the bolts and removably held in position by means of'nuts 3% or the like threaded upon the upper ends of said bolt shanks. The hammer 18 is provided with a bearing plate 35 upon its upper end with a concave upper surface fitting and slidably engaging the arcuate surface of the depending enlargement 21, and contact between these two surfaces is maintained by means of the springs 32 urging the bolts 29 upwardly together with the saddle 27.

In operatiomthe helve 8 is allowed to lower for causing movement of the hammer and its die toward the die block and as this takes place, the angular relation. of the hammer and helve is changed, such change being per- .mitted by swinging movement of the bolts 29 relative to the helve at which time the cross head 24: rotates partially in the groove 22 and the bearing plate 35 slides forwardly on the depending enlargement 21. In the initial lifting operation of the helve 8, the operating mechanism is cushioned to a certain extent by the springs 32 and then the reverse swinging of the bolts 29 takes place under the yielding action of the springs 32.

It will be seen that the means for attaching the hammer tothe helve substantially involves a U-shaped yoke 27, 29 having a part extending through the hammer and having a spring pressed sliding cross head 24: pivotally mounted transversely of the .helve and urged by springs into engagement with the upper surface of the helve. Also,

it will be seen that this connection is composed ofa number of separable yet durable parts Whichmay be cheaply and easily manufactured as well as placed into use and which will efficiently serve the function for which it is intended.

From the foregoing description, it is believed that the construction and operation as Well as the advantages of the present in vention will be readily understood and appreciated by those skilled in the art.

Minor changes may be made in the invention without departing from the spirit and scope of the same, as claimed.

hat is claimed as new is:

1. In a power hammer wherein a helve is provided and mounted for vertical swinging movement and wherein a hammer is slidably guided for vertical movement adjacent the free end of the helve, a yoke extending through said hammer and upwardly along opposite sides of'the helve, and a transverse cross head slidably mounted upon the yoke above the helve and pivotally mounted transversely in the upper surface upwardly along opposite sides of thehelve,

and a cross head slidably mounted upon the legs of the yoke and journaled in said transverse groove.

3. The combination with the vertically swinging helve of a power hammer having a transverse groove in the upper surface of the free'end thereof and a vertically slid-able and guided hammer disposedbeneath said free end of the helve, of a yoke having its intermediate portion extending,

through the hammer and its legs extending upwardly along opposite sides of the helve, a cross head slidably mounted upon the legs of the yoke and journaled insaid transverse groove, nuts upon the upper .ends of said yoke legs, and compression springs surrounding the legs of the yokebetweenthe cross head and said nuts.

4. The combination with the vertically swinging helve of a power hammer having a transverse groove in the upper surface of the free end thereof and a vertically slidable and guided hammer disposed beneath said free end of the helve, of a yoke having its intermediate portion extending through the hammer and its legs extending upwardly along opposite sides of the helve, a cross head slidably mounted upon the legs of the yoke and journaled in said transverse groove, nuts upon the upper end of said yoke legs, compressed springs surrounding the legs of the yoke between the cross head and said nuts, the intermediate portion of the yoke which extends through the hammer comprising a saddle with bifurcated. ends forming a pair of upwardly curved legs at each end of the saddle, and the legs of said yoke including T-head bolts with the heads of the same engaged under the bifurcated ends of'the saddle.

5. The combination with the vertically" swinging helve of a power hammer having a transverse groove in the upper surface of the free end thereof and a vertically slidable and guided hammer disposed beneath said free end of the helve, of a yoke having its intermediate portion extending through the hammer and its legs extending upwardly along opposite sides of the helve, a cross head slidably mounted upon the legs of the yoke and journaled in said transverse groove, nuts upon the upper ends of with an arcuate convex lower surface con-' centric with said transverse groove, and a bearing plate fitting and slidably engaging said arcuate surface and carried upon the upper end of the hammer.

In testimony whereof I afiix my signature.

JOSEPH SUSTARICH. 

